Fuel-gas burner



(No Model.)

D. MITCHELL 8:13. D. ABBOTT.

FUEL GAS BURNER.

No. 533,074. v Patented Jan; 29, 1895.

Ill-JIM II I l I I 5 2T.

v INVENTOHS L1 ATTORNEY.

WITNESSES: mffi MM J VM HETERs w. nuomuwa. WASHINGTON. u. c.

NTTED STATES ATENT EEICE. 7

DAVID MITCHELL AND ELMER DORICK ABBOTT, on DAYTON, OHIO; SAID MITCHELLASSIGNOR TO BENJAMIN cATEs, OF NEW LEBANON, NEW

YORK.

FUEL-GAS BURNER. I

SPECIFICATION forming part of Letters Patent No. 533,074, dated January29, 1895,

Application filed April 14, 1894- To all whom it may concern.-

Beit known that we, DAVID MITcHELL and ELMER DORIOK' ABBOTT, of Dayton,county of Montgomery, State of Ohio, have invented a new and usefulImprovement in Fuel-Gas Burners; and we do declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to theletters of reference marked thereon, which form a part of thisspecification.

Our invention relates to new and useful improvements in fuel gasburners, and is adapted for use in furnaces, stoves, and the like.

The object of the invention is to provide a burner of the class named,consisting of a number of segmental parts each of which is a separateburner of itself, and all of which are adapted to be placed in the firebowl of the furnace to form a complete circular burner. Each of saidsegments so placed is independently mounted on its respective inletpipe, and has no attachment with the adjacent se ments.

A further object is to provide a burner with a circular gas chamber ofsuch dimensions that afford a complete radiation and circulation of thegas, uniformly throughout the circumferential arc of the fire bowl, anda thorough transmission or distribution of the heat against the surfaceof said firebowl.

A further object is to provide a burner of this type, having but onejoint, and that at a point below the point where the gas enters saidsegments, so that the efficiency of the burner is materially enhanced,and the possibility of leakage prevented.

To these ends our invention has reference to means that will be fullydescribed in the specification, and pointed outin the claim.

Referring to the annexed drawings, Figure 1, is a side elevation of ourimproved burner, showing the same in the fire bowl of a furnace whichappears in section, and broken away; Fig. 2, a top plan view of theburner removed from the furnace; Fig. 3, a section of one of thesegments on the line x-w of Fig. 1; Fig. 4, a detached, detail View ofthe Serial No. 507.510. (N0 model.)

inner face of one of the detachable bottom plates; Fig. 5, a verticalsection through the center of one of the segments.

In the drawings similar letters of reference indicate correspondingparts.

(A) designates a hollowcastin g of segmental form, four of whichcomplete a circle, and are preferable in constructing the burner, but itwill be understood, these segmental parts may be increased or decreasedin number without departing from the circular form of therburner.

(A) is the bottom plate for each segment, and forms the only jointtherein which is made air tight by the application of cement.

The castings (A) and (A) are preferably constructed of heavy cast iron,and the former is provided with a depth substantially as shown in Fig.5, and is provided in its radiating or outer curved side with jetperforations (at) extending throughout said curved side. The bottomplate of each segment has a nozzle (b) with an inner annular shoulder(b) that forms a socket for the gas pipe (B) which abuts with saidshoulder. By means of these nozzles, each segment of the burner isindependently supported on its respective inlet pipe.

(0) designates bolts by which the plates (A) are made secure to thesegments, in addition to the cement by which said plates are sealed. Theouter or curved edge of the plates (A) are each provided withprojections or teeth (a') as shown in Fig. 2, which project laterallybeyond the outer or curved sides of the segments. The object of theseteeth is to assist in maintaining each segment firmly in position on itsinlet pipe.

The projections (a) come in contact with the inner surface of the firebowl of the furnace, E, as shown in Fig. 1, and there is preferably aspace of about one and ahalf inches between the inner surface of thefire bowl and the radiating surface of the burner. By constructing theseprojections in the form of teeth, as seen in Fig. 2, the air ispermitted to freely pass up as itenters the draft door, and circulatearound the burner.

(C) designates a deflector or inner metallic shell, constructedpreferably of galvanized iron, and conforming in shape to the shape ofthe segment (A), and which is adapted to fit in said segment. Thisshell, of which there is one for each segment, rests upon lugs (e) thatproject upwardly from the inner face of the plate (A'), and has a flange(f) extending outwardly from the upper edge of its outer or curved side,and that abuts with the upper curved portion of the casting (A), so thatit is maintained in position shown in Figs. 3 and 5. The object of theshell is to obtain the space or gas chamber (D) which extends throughoutthe bottom, and curved sides of each segment, and wherein the gas isthoroughlyand rapidly circulated through the jet openings. The gas pipesenter as shown in Fig. 1, and each one runs to its respective segment ashereinbefore described.

Where the burner is used in the ordinary furnace or stove, the pipes (B)can be introduced through the ash pit door, and in either event, the airthat enters through the lower door causes an upward current which hasthe effect of keeping the bottom plates (A') comparatively cool. Thisprevents any material pipe to form a complete circular burner; bottomplates for said segments provided with radial teeth or projectionsadapted to come in contact with the inner surface of the fire bowl tomaintain said segments in a uniform and firm position, substantially asdescribed. In testimony whereof we have hereunto set our hands this 17thday of March, 189i.

DAVID MITCHELL. ELMER DORICK ABBOTT. WVitnesses:

R. J. MGOARTY, S. A. DICKSON.

